https://pastebin.com/gDiMCEpC

https://github.com/Shopify/pyoozie/blob/master/Makefile

What actually is my_cmd.python.2 and my_cmd.python.3 really do.
In these, What actually is happening in these lines?

   1. python_version_full := $(wordlist 2,4,$(subst ., ,$(shell python
   --version 2>&1)))
   2. python_version_major := $(word 1,${python_version_full}
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